Edwaed weston



(No Model.)

E. WESTON.

DYNAMO ELECTRIC MACHINE.

No. 259,617. Pategced June 13, -lBZ.

N. PETERS. Phommhagmphef, wasnmgwn. nc,

UNITED STATES PATENT CEETCEC EDWARD I/VESTON, OF NEARK, NEW JERSEY,ASSIGNCR TC THE UNITED STATES ELECTRIC LIGHTING COMPANY, OF NEIV YORK,Y.

DYNAMO-ELECTRIC MACHINE.

SPECIFICATION forming part of Letters :Patent No. 259,617, dated June13, 1882.

Application tiled December 13, 1881.

To all whom fit may concern Be it known that I, EDWARD WESTON, a subjectofthe Queen of GreatBritain, and aresidentof Newark, in the county ofEssex and State of New Jersey, have invented certain new and usefulImprovements in Dynamo- Electric Machines, of which the following is aspecitieation, reference being had to the drawings accompanying andforming a part ofthe 1o same.

My invention is designed as an improvement on the machines shown anddescribed in former patents granted to me and in applications by memade, the main object of the improvement being to render the saidmachines better suited for the purposes of incandescent lighting,electroplating, or other and similar purposes; and to this end theinvention consists in a novel method of winding` the conductors 2cforming the coils of the revolving armature and forming the connectionsfrom the same to the commutators, as will be more fully hereinafterdescribed.

In the accompanying drawings, illustrative 2 5 of the invention, Figurel is a sectional view ot'a complete armature with its appurtenances, thecoils of which are wound and connected to the commutatore in accordancewith my present invention. Fig. 2 is a diagrammatic illus- 3o tration cithe method of winding and connection as employed in the systems inventedby me, to which reference is made above; and Fig. 3, a similar diagram,illustrative ot' my present improvement.

3 5 The armatures constructed in accordance with my former patentsconsist in the main of a cylindrical core composed of magnetic plates,with interposed disks of insulating material, in which grooves orrecesses parallel 4o with the axis are cut for the reception of thecoils. These latter are wound in sections in diametrically-oppositerecesses, and the several sections connected by loops, from whichconnection is made to the segments of the coniinutator. Each section ordivision ofthe coil has thus its corresponding segment, and as thosesegments on opposite sides of a line bisecting the commutator throughthe neutral points are of opposite polarity, it is evident (No model.)

that if collecting-brushes be applied to the seg- 5o ments at or nearthe neutral points the result is a machine the electro-motive force ofwhich is the aggregate electro-motive force of the total number ofsections of coil on the armature divided by two. In order, therefore, torender these machines capable of producing currents ot'less intensityand greater quantity, and at the same time secure the other advantagesaccruing from the described method ot' construction, I take off loopsfrom the several 6o sections of conductor at two points instead of one,employing forthis purposetwo commutators and two sets ot'collecting-brushes. The loops must be taken off from the sections atsuch points as will insure an equal division ot' e5 the current betweenthem; so, in ordcrthat this may be done without having both commutatorsat the same end ot` the armature, the sections or coils are formed withan odd number of turns. In this case the loops from any given 7o sectionwill be diagonally opposite each other with respect to the core uponwhich said coils or sections are wound. This will be understood byreference to Figs. 2 and 3. In Fig. 2 a section of continuously-woundcoil is shown, the loops taken at the junction only of each coil withthe next, and represented by a u. This coil, as is well known, is woundcontinuously about the armature and upon itself until a complete circleof loops is formed. In Eig. 3 the 8o same system of winding is followed;but two loops, b c, are here taken olf at the junctions between theseveral coils and also from the middle of each coil. Loops thus formedare in the same coil at all times of opposite polarity.

When heavy wires are used they may be cut wherever it is desired to forma loop to avoid bcndi n g, and instead of winding the coils back onthemselves, as is done in other forms, each one may be formedsuccessively and separately 9o alongside of each other.

In Fig. l the core is shown as composed of the perforated plates A,fixed on a shaft, B, and separated from each other by the thin disks ofinsulating material C. Upon the cylindrical surface ot' this core, or ingrooves cnt for their reception, the coils D D are wound, theconnections t'rom each bein g made,as abovedescribed,

by means oi' the loops or united ends b cto arms E, forming part of thecommutator-segments. Frein this machine two separate currents may betaken and applied to different purposes, or the' two sets of brushes maybe connected together to give a single current, the brushes beingjoinedeither in multiple arc or in series.

Having thus described my invention, what I claim as new, and desire tosecure by Letters 1o Patent, is-

l. A cylindrical armature for dynamo-electric machines, Wound with adouble system of continuous coils in separate divisions, in combinationWith two independent commutators,

connected respectively With loops taken from 15 Witnesses:

PARKER W. PAGE, W. FRisBY.

